An Improved Mixed Integer Linear Programming Approach Based on Symmetry Diminishing for Unit Commitment of Hybrid Power System

Bo Fu, Chenxi Ouyang, Chaoshun Li, Jinwen Wang and Eid Gul
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Bo Fu: School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China
Chenxi Ouyang: School of Electrical and Electronic Engineering, Hubei University of Technology, Wuhan 430068, China
Chaoshun Li: School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Jinwen Wang: School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Eid Gul: China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China

Energies, 2019, vol. 12, issue 5, 1-14

Abstract: In this paper, the mixed integer linear programming (MILP) for solving unit commitment (UC) problems in a hybrid power system containing thermal, hydro, and wind power have been studied. To promote its efficiency, an improved MILP approach has been proposed, while the symmetric problem in MILP formulas has been solved by reforming hierarchical constraints. Experiments on different scales have been conducted to demonstrate the effectiveness of the proposed approach. The results indicate a dramatic efficiency promotion compared to other popular MILP approaches in large scale power systems. Additionally, the proposed approach has been applied in UC problems of the hybrid power system. Two indexes, fluctuation degree and output degree, have been proposed to investigate the performance of renewable energy sources (RES). Several experiments are also implemented and the results show that the integration of pumped hydroelectric energy storage (PHES) can decrease the output of thermal units, as well as balance wind power fluctuation according to the load demand.

Keywords: unit commitment; mixed integer linear programming (MILP); symmetry diminishing; improved hierarchical constraints; PHES; renewable energies; RES (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (15)

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